Ruma is a Matrix homeserver. In order to understand what that means, you first need to understand Matrix.

Matrix is a protocol for communicating online.

Matrix-powered apps, called Matrix clients, have all the features you'd want and expect from a modern chat app: instant messaging, group chats, audio and video calls, searchable message history, synchronization across all your devices, and more.

To use a Matrix client, you create an account on a Matrix homeserver. Your Matrix homeserver is your hub into the Matrix network. It stores your account information and all your conversations. You can communicate with people on your own homeserver or people on other homeservers. When you communicate with people on other homeservers, your homeserver and the other homeservers involved synchronize the conversation history. This allows you to communicate with anyone in the Matrix network seamlessly, without ever thinking about which homeserver they connect to.

Programming language: Rust
License: MIT License
Tags: Distributed Systems     API     Matrix.org    
Latest version: v0.22.0-alpha.1
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Ruma – Your home in Matrix.

A set of Rust crates (libraries) for interacting with the Matrix chat network.

websitechatunstable documentation

Getting started

If you want to build a Matrix client or bot, have a look at matrix-rust-sdk. It builds on Ruma and includes handling of state storage, end-to-end encryption and many other useful things.

For homeservers, bridges and harder-to-categorize software that works with Matrix, you're at the right place. To get started, add ruma to your dependencies (as a git dependency if you want all of the latest improvements), enable all Cargo features that seem relevant and run cargo doc -p ruma --open. The ruma crate re-exports all relevant things, except for ruma-client, which you can use to make client-API calls to a Matrix homeserver¹.

If you use the crates through crates.io, make sure to choose versions of ruma and ruma-client that depend on the same / compatible versions of the other crates (checking one, for example ruma-common, is enough though). At the time of writing the latest versions are ruma 0.0.2 and ruma-client 0.5.0-alpha.1, which can be used together.

If you're using the crates through git, just use the same rev (or branch if you want to control the exact version only through Cargo.lock) for both.

This may seem a little convoluted, that's because it is. We're working on it.

¹ (better) support for the other APIs is planned


As of 2021-01-19, we support the vast majority of endpoints in all of the various Matrix APIs except the identity service API (if you want to help with that, have a look at the crate/ruma-identity-service-api label).



Minimum Rust version

Ruma currently requires Rust 1.45. In general, we will never require beta or nightly for crates.io releases of our crates, and we will try to avoid releasing crates that depend on features that were only just stabilized.

There are two exceptions to this:

  • ruma-signatures (and hence ruma with the federation-api feature) since it depends on ring, which is only guaranteed to work on the latest stable.
  • ruma-client depends on some I/O libraries (and also on ring, conditionally), so it is also only guaranteed to work on the latest stable.



*Note that all licence references and agreements mentioned in the Ruma README section above are relevant to that project's source code only.